This documentation, 11 pages, was published in 1981 and can be found on Research Gate. CLICK HERE to view that web page or download the PDF.

The following is an excerpt from the publication:

Predicting the Properties of the 113-120 Transactinide Elements (1981)

Danall Bonchev” and Verglnla Kamenska
Department of Physical Chemistty, The Higher School of Chemical Technology, 8010 Burgas, Bulgaria (Received: May 9, 1980;
In Final Form: November 11, 1980)

The information indices, recently introduced for the description of the electronic structure of atoms, are used as a more convenient basis than atomic number (or period number) for correlations with the properties of the chemical elements within the main groups of the periodic table. When the derived equations are extrapolated, the expected values for a number of properties or characteristics of the 113-120 transactinide elements are obtained: entropies in the gas and solid state, heats of melting and sublimation, melting and boiling points, first and second ionization potentials, atomic, volumes, densities, covalent radii, and orbital exponents. Some corrections to the predictions were made by proceeding from the similarity in the trend of the expected values for elements 113-120 and the known data on elements 81-88. Some properties of elements 85-88, missing from the literature, were also calculated.


During the last 35 years the periodic table of chemical elements was considerably extended when the 15 transuranium elements up to element 106 were ~ynthesized.l-~ The prediction of islands of nuclear ~tability~-~ around elements 114 and 164 has prompted greatly the efforts to synthesize new superheavy elements as well as to search for some of them in nature.*-1° Relativistic HartreeFock-Slater (or Dirac-Slater) cal~ulations~~-’~ have been carried out for chemical elements up to 172 providing estimates of their most stable electron configurations. The prospect of further evolution of the periodic table has been a subject of considerable interest.l4-lg All this has encouraged attempts to predict the physical and chemical properties of superheavy elements by extrapolating the properties of the known elements in Mendeleev’s style, as well as by using various approximate method^.^*^^

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